材料比色表面 pH 值测量的正交、圆柱和多变量颜色参数的回归分析。

Regression Analysis of Orthogonal, Cylindrical and Multivariable Color Parameters for Colorimetric Surface pH Measurement of Materials.

机构信息

Department of Wood, Pulp and Paper, Institute of Natural and Synthetic Polymers, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia.

Institute of Information Engineering, Automation, and Mathematics, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia.

出版信息

Molecules. 2021 Jun 16;26(12):3682. doi: 10.3390/molecules26123682.

DOI:10.3390/molecules26123682

PMID:34208709

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8234292/

Abstract

The surface pH is a critical factor in the quality and longevity of materials and products. Traditional fast colorimetric pH detection-based tests such as water quality control or pregnancy tests, when results are determined by the naked eye, cannot provide quantitative values. Using standard pH papers, paper-printed comparison charts, or colorimetric microfluidic paper-based analytical devices is not suitable for such technological applications and quality management systems (QMSs) where the particular tested material should contain a suitable indicator in situ, in its structure, either before or after the process, the technology or the apparatus that are being tested. This paper describes a method based on the combination of impregnation of a tested material with a pH indicator in situ, its exposure to a process of technology whose impact on pH value is to be tested, colorimetric pH measurement, and approximation of pH value using derived pH characteristic parameters (pH-CPs) based on CIE orthogonal and cylindrical color variables. The hypotheses were experimentally verified using the methyl red pH indicator, impregnating the acid lignin-containing paper, and preparing a calibration sample set with pH in the range 4 to 12 using controlled alkalization. Based on the performed measurements and statistical evaluation, it can be concluded that the best pH-CPs with the highest regression parameters for pH are ∆∆ and . The experimental results show that the presented method allows a good estimation of pH detection of the material surfaces.

摘要

表面 pH 值是材料和产品质量和寿命的关键因素。传统的基于快速比色 pH 值检测的测试，如水质控制或妊娠测试，当结果通过肉眼确定时，无法提供定量值。使用标准 pH 试纸、印有比色图表的纸张或比色微流控纸基分析设备，不适用于需要在特定测试材料的原位结构中包含适当指示剂的技术应用和质量管理系统（QMS），无论是在测试之前还是之后，无论是在过程、技术还是正在测试的设备中。本文介绍了一种基于原位浸渍测试材料与 pH 指示剂、暴露于要测试 pH 值影响的技术过程、比色 pH 值测量以及使用基于 CIE 正交和圆柱色变量的衍生 pH 特征参数 (pH-CP) 逼近 pH 值的方法。使用甲基红 pH 指示剂对含酸性木质素的纸张进行浸渍，并使用受控碱化制备 pH 值在 4 到 12 范围内的校准样本集，对假设进行了实验验证。基于所进行的测量和统计评估，可以得出结论，对于 pH 值，具有最高回归参数的最佳 pH-CP 是 ∆∆ 和。实验结果表明，所提出的方法允许对材料表面的 pH 值检测进行良好的估计。